Intravascular pump
First Claim
1. An intravascular pump comprising a drive portion (11), a pump portion (12) connected therewith and a flexible cannula (18) projecting from the pump portion (12), characterized in that the cannula (18) consists of an expandable hose being adapted to assume a state with a relatively small first diameter and a state with a relatively large second diameter.
3 Assignments
0 Petitions
Accused Products
Abstract
The pump (10) comprises a drive portion (11) and a pump portion (12) which have such a small diameter that they can be pushed through a blood vessel (31). The pump portion (12) has a flexible cannula (18) connected thereto. In order to reduce the flow resistance of the cannula (18), the cannula (18) can be dilated to a diameter that is larger than that of the drive portion (11) and the pump portion (12), respectively. To be able to introduce the pump into the body by puncturing the blood vessel (31) according to the Seldinger technique, the cannula (18) is set into the constricted state in which it has a small diameter. In the blood vessel (31), it is dilated so that it offers a small flow resistance to the blood to be pumped there.
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Citations
11 Claims
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1. An intravascular pump comprising a drive portion (11), a pump portion (12) connected therewith and a flexible cannula (18) projecting from the pump portion (12),
characterized in that the cannula (18) consists of an expandable hose being adapted to assume a state with a relatively small first diameter and a state with a relatively large second diameter.
Specification